.clearfix::after{
    content: '';
    display: block;
    clear: both;
}

.w{
    width: 1200px;
    margin: 0 auto;
    /* border: 1px solid ; */
    position: relative;
}


/*所有页面头部样式*/
header .w .logo{
    width: 221px;
    height: 100px;
    float: left;
}

header .w .logo img{
    margin-top: 20px;
}

header .nav{
    float: right;
    text-align: center;
}

header .nav .item{
    width: 36px;
    height: 100px;
    float: left;
    margin-left: 75px;
    line-height: 100px;
    font-size: 14px;
    font-family: PingFang SC;
    font-weight: 300;
    color: #767676;
    position: relative;
}

header .nav .item:hover{
    font-size: 18px;
    font-family: PingFang SC;
    color: #668ACA;
    font-weight: 300;
}

header .nav .item:hover::after{
    content: '';
    width: 20px;
    height: 1px;
    background: #668ACA;
    position: absolute;
    bottom: 34px;
    left: 0;
    right: 0;
    margin: auto;
}

header .nav .item.active{
    font-size: 18px;
    font-family: PingFang SC;
    color: #668ACA;
    font-weight: 300;
}

header .nav .item.active::after{
    content: '';
    width: 20px;
    height: 1px;
    background: #668ACA;
    position: absolute;
    bottom: 34px;
    left: 0;
    right: 0;
    margin: auto;
}
/*所有页面头部样式结束*/

/* 标题title*/
.title .ch{
    font-size: 30px;
    font-family: PingFang SC;
    font-weight: 400;
    color: #767676;
}

.title .en{
    margin-top: 6px;
    font-size: 12px;
    font-family: PingFang SC;
    font-weight: 200;
    color: #767676; 
}

.title .line{
    height: 1px;
    margin-top: 6px;
}

.title .line .left{
    width: 60px;
    height: 1px;
    background: #A1A1A1;
    float: left;

}

.title .line .right{
    width: 300px;
    height: 1px;
    background: #A1A1A1;
    float: right;
}
/* 标题title 结束*/


/*所有页面尾部样式*/
footer{
    width: 100%;
    height: 262px;
    font-size: 16px;
    color: #767676;
    box-sizing: border-box;
    padding-top: 99px;
    margin-top: 200px;
    background-color: #F7F7F7;
}

footer .w .company{
    width: 387px;
    height: 74px;
    border-right: 1px solid #E9E9E9;
    float: left;
}

footer .w .company .icon{
    margin-top: 10px;
}

footer .w .address{
    float: left;
    margin-left:61px;
    margin-right: 180px;
}

footer .w .address p:nth-child(2){
    margin-top: 16px;
}

footer .w .address p:nth-child(3){
    margin-top: 16px;
}

footer .w .ph-num{
    height: 74px;
    width: fit-content;
    float: left;
}

footer .w .ph-num p:nth-child(2),footer .w .ph-num p:nth-child(3){
    margin-top: 16px;
}

/*所有页面尾部样式 over*/

